This is the issue which SharePoint Server administrators face while maintaining their SharePoint farm is while maintenance, the free space of the drive where SQL is stored comes down.

This is because of the SharePoint log file size increasing. This leads to performance issues on those servers.

The "SharePoint_Config_Log" file increases rapidly, due to various operations in different SharePoint sites. As a result, it affects the performance of the SharePoint server which is associated with the SharePoint_Config database.